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USSR
ISU-122 |
| The ISU-122 based on the existing SP Gun and was in use from 1944. |
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| | Specifications | | Operational Date(s) | 1944 | | Ordnance classification | | | Quantity Produced | 0 | | Weight | unknown | | Crew | 4 | | M.G's small | n/a | | M.G's large(>10mm) | 1 | | Length | 8.40 mtr | | Width | 3.15 mtr | | Height | 2.52 mtr | | Engine Details/Performance | | Max Road Speed | 23 mph | | Max Cross Country Speed | 14 mph | | Range Road | 0 miles | | Range Cross Country | unknown | | Fuel Type | Unknown | | Fuel Capacity | unknown | | Horse Power | 0 hp | | Power/Weight | unknown | | | General Information | The ISU-122 based on the existing SP Gun and was in use from 1944.
It was armed with 1 large machine gun Its main armament consisted of a 122mm Corps Gun M1931/1937 A19S L/45 which could penetrate 7 mm of flat plate at 400 metres .
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| | Turret | | Front | n/a | | Side | n/a | | Rear | n/a | | Top | n/a |
| | Superstructure | | Front | | 90mm | @ | 45° | (127mm) | | Side | | 90mm | @ | 30° | (104mm) | | Rear | | 60mm | @ | 20° | (64mm) | | Top | | 30mm | @ | 90° | (30mm) |
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| Hull | | Front | | 90mm | @ | 45° | (127mm) | | Side | | 90mm | @ | 0° | (90mm) | | Rear | | 60mm | @ | 0° | (60mm) | | Top | | 30mm | @ | 90° | (30mm) |
| | Armour (x)mm @ (y)° (Effective mm @ 0°) | | Effective Armour - Maximum 127 mm - Minimum 30 mm |
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| Weapon Details |
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122mm Corps Gun M1931/1937 A19S L/45 |
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| | Calibre | 122mm |
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| | Length | L/45 |
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| Ammunition Details |
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| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
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20mm HE
(HE High Explosive)
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122mm 0.096Kg 770M/Sec | 0.007Kg explosive |
| Range(Mtr) | 1000 | 2000 | 3000 | 4000 | 5000 | 6000 | 7000 | 8000 |
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| Flight Time(Secs) |
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| Direct Fire |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.14 |
0.29 |
0.65 |
1.75 |
3.97 |
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| Hit Probability(%) |
98 |
98 |
98 |
77 |
22 |
0 |
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| Blast/Fragmentation Effects |
| Burst radius Infantry in open 99% kill | 3 mtr |
Burst radius Infantry in open 66% kill | 7 mtr |
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| Burst radius Infantry in open 33% kill | 17 mtr |
Armour Penetration inc roof at 1 mtr | 0 mm |
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| An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal. |
| An explosion within 7 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. |
| An explosion within 17 mtr of infantry in the open will cause 33% casualties. |
| The blast effect of this shell exploding within 1 mtr of an armoured vehicle will not cause any significant armour damage. |
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OF-471
(APHE Armor Piercing High Explosive)
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122mm 25Kg 800M/Sec | |
| Quoted Penetration 120mm @ 500mtr/30° ( ≈ 138mm/0°) |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.13 |
0.25 |
0.52 |
1.07 |
1.66 |
2.3 |
2.99 |
3.73 |
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| Penetration(mm@30°) |
212 |
199 |
185 |
168 |
152 |
137 |
122 |
109 |
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| Penetration(mm@0°) |
245 |
230 |
214 |
194 |
176 |
159 |
142 |
126 |
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| Hit Probability(%) |
98 |
98 |
98 |
98 |
81 |
57 |
29 |
22 |
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OF-471
(HE High Explosive)
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122mm 25Kg 800M/Sec | 3.600Kg explosive |
| Range(Mtr) | 1000 | 2000 | 3000 | 4000 | 5000 | 6000 | 7000 | 8000 |
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| Flight Time(Secs) |
1.36 |
2.99 |
4.97 |
7.44 |
10.59 |
14.76 |
20.53 |
29.05 |
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| Direct Fire |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.13 |
0.25 |
0.52 |
1.07 |
1.66 |
2.3 |
2.99 |
3.73 |
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| Hit Probability(%) |
98 |
98 |
98 |
98 |
81 |
57 |
29 |
22 |
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| Blast/Fragmentation Effects |
| Burst radius Infantry in open 99% kill | 4 mtr |
Burst radius Infantry in open 66% kill | 9 mtr |
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| Burst radius Infantry in open 33% kill | 24 mtr |
Armour Penetration inc roof at 1 mtr | 10 mm |
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| An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal. |
| An explosion within 9 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. |
| An explosion within 24 mtr of infantry in the open will cause 33% casualties. |
| The blast effect of this shell exploding within 1 mtr of an armoured vehicle will penetrate 10 mm of the tank armour including the roof. |
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Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.
The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive
and numerous books and websites that have provided the detailed information that has not been available anywhere else. The
information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre,
the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation
originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.
© WWIITanks 1980-2024
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